INFLUENCE OF FLY ASH AND MOIST CURING

Cubes and slab specimens prepared from 3 concrete mixtures containing 3 types of fly ash, Classes F, C and F/C and a control portland cement concrete were cast and moist cured for either 7, or 28 days. For all 4 concretes, the chloride ion permeability decreased when the length of moist curing was increased from 7 to 28 days. However, after 12 months of testing, the 2 mixes containing FA Class F and F/C exhibited such low chloride ion contents at depths below 25 mm that the length of moist curing had little influence in chloride ion reduction in contrast to that found for PC concrete and, to a lesser extent, concrete containing FA Class C. Use of all 3 FA materials resulted in remarkable improvement in concrete impermeability when compared with PC concrete.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 257-269
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00624305
  • Record Type: Publication
  • Report/Paper Numbers: SP-132
  • Files: TRIS
  • Created Date: Oct 13 1993 12:00AM